resources/Meta.java

   1 package be.nikiroo.utils.resources;
   2
   3 import java.lang.annotation.ElementType;
   4 import java.lang.annotation.Retention;
   5 import java.lang.annotation.RetentionPolicy;
   6 import java.lang.annotation.Target;
   7
   8 /**
   9  * Annotation used to give some information about the translation keys, so the
  10  * translation .properties file can be created programmatically.
  11  *
  12  * @author niki
  13  */
  14 @Retention(RetentionPolicy.RUNTIME)
  15 @Target(ElementType.FIELD)
  16 public @interface Meta {
  17         /**
  18          * The format of an item (the values it is expected to be of).
  19          * <p>
  20          * Note that the INI file can contain arbitrary data, but it is expected to
  21          * be valid.
  22          *
  23          * @author niki
  24          */
  25         public enum Format {
  26                 /** An integer value, can be negative. */
  27                 INT,
  28                 /** true or false. */
  29                 BOOLEAN,
  30                 /** Any text String. */
  31                 STRING,
  32                 /** A password field. */
  33                 PASSWORD,
  34                 /** A colour (either by name or #rrggbb or #aarrggbb). */
  35                 COLOR,
  36                 /** A locale code (e.g., fr-BE, en-GB, es...). */
  37                 LOCALE,
  38                 /** A path to a file. */
  39                 FILE,
  40                 /** A path to a directory. */
  41                 DIRECTORY,
  42                 /** A fixed list of values (see {@link Meta#list()} for the values). */
  43                 FIXED_LIST,
  44                 /**
  45                  * A fixed list of values (see {@link Meta#list()} for the values) OR a
  46                  * custom String value (basically, a {@link Format#FIXED_LIST} with an
  47                  * option to enter a not accounted for value).
  48                  */
  49                 COMBO_LIST
  50         }
  51
  52         /**
  53          * A description of this item.
  54          *
  55          * @return what it is
  56          */
  57         String description() default "";
  58
  59         /**
  60          * This item is only used as a group, not as an option.
  61          * <p>
  62          * For instance, you could have LANGUAGE_CODE as a group for which you won't
  63          * use the value in the program, and LANGUAGE_CODE_FR, LANGUAGE_CODE_EN
  64          * inside for which the value must be set.
  65          *
  66          * @return the group
  67          */
  68         boolean group() default false;
  69
  70         /**
  71          * What format should/must this key be in.
  72          *
  73          * @return the format it is in
  74          */
  75         Format format() default Format.STRING;
  76
  77         /**
  78          * The list of fixed values this item can be (either for
  79          * {@link Format#FIXED_LIST} or {@link Format#COMBO_LIST}).
  80          *
  81          * @return the list of values
  82          */
  83         String[] list() default {};
  84
  85         /**
  86          * This item can be left unspecified.
  87          *
  88          * @return TRUE if it can
  89          */
  90         boolean nullable() default true;
  91
  92         /**
  93          * This item is a comma-separated list of values instead of a single value.
  94          *
  95          * @return TRUE if it is
  96          */
  97         boolean array() default false;
  98
  99         /**
 100          * An addition to the format.
 101          * <p>
 102          * Free info text to help translate, for instance the parameters order and
 103          * type for String translations (i.e., %s = input file name, %d = file size
 104          * in MB).
 105          *
 106          * @return some info
 107          */
 108         String info() default "";
 109 }